spider {mvpart} | R Documentation |
The spider
data frame has 28 rows and 18 columns.
The first 12 columns are abundances of different species of spiders
and the next 6 are environmental data.
data(spider)
This data frame contains the following columns:
arct.lute, pard.lugu, zora.spin, pard.nigr, pard.pull,
aulo.albi, troc.terr, alop.cune, pard.mont, alop.acce,
alop.fabr, arct.peri
water, sand, moss, reft, twigs, herbs
Van der Aart, P. J. and N. Smeeck-Enserink. 1975. Correlations between distributions of hunting spiders (Lycosidae, Ctenidae) and environmental characteristics in a dune area. Netherlands Journal of Zoology. 25:1-45.
These data were analysed using multivariate trees in De'ath, G. 2002. Multivariate Regression Trees: A New Technique for Modelling Species-Environment Relationships. Ecology. 83(4):1103-1117
data(spider) fit<-mvpart(as.matrix(spider[,1:12])~water+twigs+reft+herbs+moss+sand,spider) summary(fit)